Home / 18,724.68-28,081.38-15,429.60

Finding the Fourth Proportional to 18,724.68, 28,081.38 and 15,429.60

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Solution

The fourth proportional to 18,724.68, 28,081.38 and 15,429.60 is: 23,139.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.68 : 28,081.38 = 15,429.60 : x
  2. Step 2: Convert to fraction form
    18,724.68/28,081.38 = 15,429.60/x
  3. Step 3: Cross multiply
    18,724.68x = 28,081.38 × 15,429.60
  4. Step 4: Simplify right side
    18,724.68x = 433,284,460.85
  5. Step 5: Solve for x
    x = 433,284,460.85/18,724.68
  6. Step 6: Final answer
    x = 23,139.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.